1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
// SPDX-License-Identifier: GPL-2.0
#ifndef STATS_AXIS_H
#define STATS_AXIS_H
#include <memory>
#include <vector>
#include <QBarCategoryAxis>
#include <QCategoryAxis>
#include <QFont>
#include <QGraphicsSimpleTextItem>
#include <QGraphicsLineItem>
#include <QValueAxis>
namespace QtCharts {
class QChart;
}
class StatsAxis : QGraphicsLineItem {
public:
virtual ~StatsAxis();
// Returns minimum and maximum of shown range, not of data points.
std::pair<double, double> minMax() const;
std::pair<double, double> minMaxScreen() const; // minimum and maximum in screen coordinates
double width() const; // Only supported by vertical axes. Only valid after setSize().
double height() const; // Only supported for horizontal axes. Always valid.
void setSize(double size); // Width for horizontal and height for vertical.
void setPos(QPointF pos); // Must be called after setSize().
void setRange(double, double);
// Map x (horizontal) or y (vertical) coordinate to or from screen coordinate
double toScreen(double) const;
double toValue(double) const;
std::vector<double> ticksPositions() const; // Positions in screen coordinates
protected:
StatsAxis(QtCharts::QChart *chart, const QString &title, bool horizontal, bool labelsBetweenTicks);
QtCharts::QChart *chart;
struct Label {
std::unique_ptr<QGraphicsSimpleTextItem> label;
double pos;
Label(const QString &name, double pos, QtCharts::QChart *chart, const QFont &font);
};
std::vector<Label> labels;
void addLabel(const QString &label, double pos);
virtual void updateLabels() = 0;
struct Tick {
std::unique_ptr<QGraphicsLineItem> item;
double pos;
Tick(double pos, QtCharts::QChart *chart);
};
std::vector<Tick> ticks;
void addTick(double pos);
int guessNumTicks(const std::vector<QString> &strings) const;
bool horizontal;
bool labelsBetweenTicks; // When labels are between ticks, they can be moved closer to the axis
QFont labelFont, titleFont;
std::unique_ptr<QGraphicsSimpleTextItem> title;
double size; // width for horizontal, height for vertical
double zeroOnScreen;
double min, max;
double labelWidth; // Maximum width of labels
private:
double titleSpace() const; // Space needed for title
};
class ValueAxis : public StatsAxis {
public:
ValueAxis(QtCharts::QChart *chart, const QString &title, double min, double max, int decimals, bool horizontal);
private:
double min, max;
int decimals;
void updateLabels() override;
};
class CountAxis : public ValueAxis {
public:
CountAxis(QtCharts::QChart *chart, const QString &title, int count, bool horizontal);
private:
int count;
void updateLabels() override;
};
class CategoryAxis : public StatsAxis {
public:
CategoryAxis(QtCharts::QChart *chart, const QString &title, const std::vector<QString> &labels, bool horizontal);
private:
void updateLabels();
};
struct HistogramAxisEntry {
QString name;
double value;
bool recommended;
};
class HistogramAxis : public StatsAxis {
public:
HistogramAxis(QtCharts::QChart *chart, const QString &title, std::vector<HistogramAxisEntry> bin_values, bool horizontal);
private:
void updateLabels() override;
std::vector<HistogramAxisEntry> bin_values;
int preferred_step;
};
class DateAxis : public HistogramAxis {
public:
DateAxis(QtCharts::QChart *chart, const QString &title, double from, double to, bool horizontal);
};
#endif
|
